The high flux / high flow foldable filter element provides a scheme to effectively replace the deep and other 2.5 "inner diameter filter elements in the case of high flow. The flow rate of each pf high flow filter element can reach 1300lpm, significantly reducing the number of filter elements. The treatment capacity of one large flow filter element is equivalent to that of 10 filter elements with inner diameter of 2.5 "and length of 40". The O-ring and built-in handle make the installation of filter element fast, safe and convenient.